I think this is a really helpful challenge. I spoke to a lady who has been visiting KVFC for the last 3 weeks and who said that there were 2 ladies who had smiled at her and said hello every week and that that had basically kept her coming back!

https://salternlite.wordpress.com/2017/09/22/maybe-the-most-important-three-minutes-of-your-church-service/amp/